CHAPTER 6 DEVICENET COMMUNICATION FUNCTION
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6.1 Feature of DeviceNet communication function
SJ-DN conforms to open field Network DeviceNet and it activates as slave function (Group 2 only server).
There are two ways to communicate with the master, one is polled I/O message communication and the other
one is explicit message communication. Also SJ-DN corresponds to the AC Drive profile.
6.2 Basic DeviceNet specification
The table below describes basic DeviceNet specification of this product.
Items
Specification
Protocol
DeviceNet Volume I -Release2.0
DeviceNet Volume II-Release2.0
Support communication speed
125kbps(500m)/250kbps(250m)/500kbps(100m)
Maximum number of connection
Node
64 Nodes (Maximum number of Node for slaves are 63 Nodes)
Support connection
Explicit Message
Polled Input/Output Message
Explicit Message (Each of Data has different length which are
dependant on data.)
Data length
Polled Input/Output Message 4Bytes / 8 Bytes
Type of device
Group2 Only Server
(Predefined Master/Slave Connection Set)
Device profile
AC Drive
List of object for mounting is shown below.
Name of objects
Class ID
Instance ID
Contents
Identity
01
1
Information for distinguishing Device type, Serial
number and Vender ID etc.
Message Router
02
1
This Router gives Explicit message to appropriate
object.
DeviceNet
03
1
It controls Physical connection for DeviceNet
20,21,100
It controls Polled I/O Output Message.
Assembly
04
70,71,101
It controls Polled I/O Input Message.
Connection
05
1,2
It controls Connection.
Motor Data
40
1
It controls the motor connected to the inverter.
Control Supervisor
41
1
It controls control information of the inverter.
AC/DC Drive
42
1
It controls operational information of the inverter.
Inverter parameter
100
〜
109
1,2,3
It controls inverter parameter.
See Appendix about details of Inverter parameter.
